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/*
* ----------------------------------------------------------------------------
* "THE BEER-WARE LICENSE" (Revision 42):
* <phk@login.dknet.dk> wrote this file. As long as you retain this notice you
* can do whatever you want with this stuff. If we meet some day, and you think
* this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
* ----------------------------------------------------------------------------
*
* $Id: write_disk.c,v 1.17 1996/04/29 05:03:02 jkh Exp $
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <err.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/disklabel.h>
#include <sys/diskslice.h>
#include "libdisk.h"
#define DOSPTYP_EXTENDED 5
#define BBSIZE 8192
#define SBSIZE 8192
#define DEF_RPM 3600
#define DEF_INTERLEAVE 1
#define WHERE(offset,disk) (disk->flags & DISK_ON_TRACK ? offset + 63 : offset)
int
Write_FreeBSD(int fd, struct disk *new, struct disk *old, struct chunk *c1)
{
struct disklabel *dl;
struct chunk *c2;
int i,j;
void *p;
u_char buf[BBSIZE];
for(i=0;i<BBSIZE/512;i++) {
p = read_block(fd,WHERE(i + c1->offset,new));
memcpy(buf+512*i,p,512);
free(p);
}
if(new->boot1)
memcpy(buf,new->boot1,512);
if(new->boot2)
memcpy(buf+512,new->boot2,BBSIZE-512);
dl = (struct disklabel *) (buf+512*LABELSECTOR+LABELOFFSET);
memset(dl,0,sizeof *dl);
for(c2=c1->part;c2;c2=c2->next) {
if (c2->type == unused) continue;
if (!strcmp(c2->name,"X")) continue;
j = c2->name[5] - 'a';
if (j < 0 || j >= MAXPARTITIONS || j == RAW_PART) {
#ifdef DEBUG
warn("Weird parititon letter %c",c2->name[5]);
#endif
continue;
}
dl->d_partitions[j].p_size = c2->size;
dl->d_partitions[j].p_offset = c2->offset;
dl->d_partitions[j].p_fstype = c2->subtype;
}
dl->d_bbsize = BBSIZE;
/*
* Add in defaults for superblock size, interleave, and rpms
*/
dl->d_sbsize = SBSIZE;
dl->d_interleave = DEF_INTERLEAVE;
dl->d_rpm = DEF_RPM;
strcpy(dl->d_typename,c1->name);
dl->d_secsize = 512;
dl->d_secperunit = new->chunks->size;
dl->d_ncylinders = new->bios_cyl;
dl->d_ntracks = new->bios_hd;
dl->d_nsectors = new->bios_sect;
dl->d_secpercyl = dl->d_ntracks * dl->d_nsectors;
dl->d_npartitions = MAXPARTITIONS;
dl->d_type = new->name[0] == 's' ? DTYPE_SCSI : DTYPE_ESDI;
dl->d_partitions[RAW_PART].p_size = c1->size;
dl->d_partitions[RAW_PART].p_offset = c1->offset;
if(new->flags & DISK_ON_TRACK)
for(i=0;i<MAXPARTITIONS;i++)
if (dl->d_partitions[i].p_size)
dl->d_partitions[i].p_offset += 63;
dl->d_magic = DISKMAGIC;
dl->d_magic2 = DISKMAGIC;
dl->d_checksum = dkcksum(dl);
for(i=0;i<BBSIZE/512;i++) {
write_block(fd,WHERE(i + c1->offset,new),buf+512*i);
}
return 0;
}
int
Write_Extended(int fd, struct disk *new, struct disk *old, struct chunk *c1)
{
return 0;
}
int
Write_Disk(struct disk *d1)
{
int fd,i,j;
struct disk *old = 0;
struct chunk *c1;
int ret = 0;
char device[64];
u_char *mbr;
struct dos_partition *dp,work[NDOSPART];
int s[4];
strcpy(device,"/dev/r");
strcat(device,d1->name);
fd = open(device,O_RDWR);
if (fd < 0) {
#ifdef DEBUG
warn("open(%s) failed",device);
#endif
return 1;
}
memset(s,0,sizeof s);
mbr = read_block(fd,WHERE(0,d1));
dp = (struct dos_partition*) (mbr + DOSPARTOFF);
memcpy(work,dp,sizeof work);
dp = work;
free(mbr);
for (c1=d1->chunks->part; c1 ; c1 = c1->next) {
if (c1->type == unused) continue;
if (!strcmp(c1->name,"X")) continue;
j = c1->name[4] - '1';
if (j < 0 || j > 3)
continue;
s[j]++;
if (c1->type == extended)
ret += Write_Extended(fd, d1,old,c1);
if (c1->type == freebsd)
ret += Write_FreeBSD(fd, d1,old,c1);
dp[j].dp_start = c1->offset;
dp[j].dp_size = c1->size;
i = c1->offset;
if (i >= 1024*d1->bios_sect*d1->bios_hd) {
dp[j].dp_ssect = 0xff;
dp[j].dp_shd = 0xff;
dp[j].dp_scyl = 0xff;
} else {
dp[j].dp_ssect = i % d1->bios_sect;
i -= dp[j].dp_ssect++;
i /= d1->bios_sect;
dp[j].dp_shd = i % d1->bios_hd;
i -= dp[j].dp_shd;
i /= d1->bios_hd;
dp[j].dp_scyl = i;
i -= dp[j].dp_scyl;
dp[j].dp_ssect |= i >> 2;
}
#ifdef DEBUG
printf("S:%lu = (%x/%x/%x)",
c1->offset,dp[j].dp_scyl,dp[j].dp_shd,dp[j].dp_ssect);
#endif
i = c1->end;
dp[j].dp_esect = i % d1->bios_sect;
i -= dp[j].dp_esect++;
i /= d1->bios_sect;
dp[j].dp_ehd = i % d1->bios_hd;
i -= dp[j].dp_ehd;
i /= d1->bios_hd;
if (i>1023) i = 1023;
dp[j].dp_ecyl = i;
i -= dp[j].dp_ecyl;
dp[j].dp_esect |= i >> 2;
#ifdef DEBUG
printf(" E:%lu = (%x/%x/%x)\n",
c1->end,dp[j].dp_ecyl,dp[j].dp_ehd,dp[j].dp_esect);
#endif
dp[j].dp_typ = c1->subtype;
if (c1->flags & CHUNK_ACTIVE)
dp[j].dp_flag = 0x80;
else
dp[j].dp_flag = 0;
}
j = 0;
for(i=0;i<NDOSPART;i++) {
if (!s[i])
memset(dp+i,0,sizeof *dp);
if (dp[i].dp_flag)
j++;
}
if (!j)
for(i=0;i<NDOSPART;i++)
if (dp[i].dp_typ == 0xa5)
dp[i].dp_flag = 0x80;
mbr = read_block(fd,WHERE(0,d1));
if (d1->bootmgr)
memcpy(mbr,d1->bootmgr,DOSPARTOFF);
memcpy(mbr+DOSPARTOFF,dp,sizeof *dp * NDOSPART);
mbr[512-2] = 0x55;
mbr[512-1] = 0xaa;
write_block(fd,WHERE(0,d1),mbr);
i = 1;
i = ioctl(fd,DIOCSYNCSLICEINFO,&i);
#ifdef DEBUG
if (i != 0)
warn("ioctl(DIOCSYNCSLICEINFO)");
#endif
close(fd);
return 0;
}
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